JPWO2016002398A1 - Battery degradation level estimation device and battery degradation level estimation method - Google Patents

Abstract

The battery degradation level estimation device includes a total degradation level detection unit 110 that detects a current total degradation level of a battery, a cycle degradation estimation unit 120 that estimates a future cycle degradation level due to charge / discharge of the battery, A storage deterioration estimation unit 130 that estimates a future storage deterioration degree that occurs over time in a battery, and a battery that estimates a future battery deterioration degree based on a current total deterioration degree, a future cycle deterioration degree, and a future storage deterioration degree Degradation estimation unit 140.

Description

  The present invention relates to a battery deterioration level estimation device and a battery deterioration level estimation method.

  A battery (secondary battery) deteriorates at a speed according to the use environment. As the battery deteriorates, the amount of charge at full charge (hereinafter referred to as “full charge capacity” as appropriate) decreases, and the discharge characteristics deteriorate. If the battery mounted on the vehicle deteriorates, the running performance decreases. Therefore, it is desirable to estimate a period (remaining life) in which the battery can exhibit predetermined performance. In the technique described in JP2007-195312A, the remaining life is predicted by estimating the degree of deterioration of the battery in association with the square root of the total travel distance.

  However, the present inventors have found a problem that the error is large even if the battery deterioration degree is estimated by the method disclosed in JP2007-195312A.

  The present invention has been made paying attention to such conventional problems. The objective of this invention is providing the technique which can estimate a battery degradation degree accurately.

  The present invention solves the above problems by the following means.

  A battery deterioration level estimation device according to an aspect of the present invention includes a total deterioration level detection unit that detects a current total deterioration level of a battery, and a cycle deterioration estimation unit that estimates a future cycle deterioration level due to charge / discharge of the battery. And a storage deterioration estimation unit that estimates a future storage deterioration degree occurring with time inside the battery. Further, a future battery deterioration level is estimated based on the current total deterioration level, the future cycle deterioration level, and the future storage deterioration level.

FIG. 1 is a block diagram showing the control contents of the first embodiment of the battery deterioration degree estimating apparatus according to the present invention. FIG. 2 is a diagram illustrating a method for setting cycle deterioration characteristics. FIG. 3 is a diagram illustrating an example of storage deterioration characteristics. FIG. 4 is a diagram illustrating an example of an estimation result of the degree of battery deterioration in the future. FIG. 5 is a block diagram showing the control contents of the total deterioration level detection unit 110. FIG. 6 is a flowchart of a life prediction routine executed by the controller of the battery deterioration estimation device. FIG. 7 is a flowchart of a travel distance & usage time storage routine executed by the controller of the battery deterioration estimation device. FIG. 8 is a diagram illustrating an example of the correlation between the travel distance and the use time stored in the controller. FIG. 9 is a flowchart of a travel distance & usage time storage routine executed by the controller of the battery deterioration degree estimation device. FIG. 10 is a diagram for explaining the concept of the second embodiment. FIG. 11 is a block diagram showing the control contents of the second embodiment of the battery deterioration degree estimating apparatus according to the present invention. FIG. 12 is a diagram for explaining the concept of the third embodiment. FIG. 13 is a diagram for explaining the concept of the fourth embodiment. FIG. 14 is a block diagram showing the control contents of the fourth embodiment of the battery deterioration degree estimating apparatus according to the present invention. FIG. 15 is a diagram for explaining the concept of the fifth embodiment. FIG. 16 is a diagram for explaining the concept of the sixth embodiment. FIG. 17 is a block diagram showing the control contents of the sixth embodiment of the battery deterioration degree estimating apparatus according to the present invention.

  Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.

(Basic concept)
As mentioned above, it is desirable to estimate the remaining battery life as accurately as possible. However, even if the deterioration degree of the battery is simply estimated in association with the square root of the total travel distance, the error is large. The inventors have conducted extensive research and found that battery deterioration includes storage deterioration and cycle deterioration. The storage deterioration is deterioration mainly caused by a chemical reaction occurring with time inside the battery. Storage degradation proceeds, for example, by a chemical reaction between the battery electrode and the electrolyte. The degree of progress of this storage deterioration corresponds to the square root of time. On the other hand, cycle deterioration is deterioration caused by repeated charging and discharging of the battery. Cycle deterioration mainly proceeds mechanically due to friction of electrodes and the like generated due to expansion and contraction of the inside of the battery when the battery is charged and discharged. The progress degree of cycle deterioration corresponds to the number of cycles (cycle) of charging and discharging. For this reason, the method of estimating the degree of deterioration of the battery simply by associating it with the square root of the total travel distance has a large error although it can be roughly estimated, and it has been difficult to estimate accurately. The inventors have completed the invention based on such findings. Details will be described below.

(First embodiment)
FIG. 1 is a block diagram showing the control contents of the first embodiment of the battery deterioration degree estimating apparatus according to the present invention.

  The battery degradation level estimation apparatus 100 includes a total degradation level detection unit 110, a cycle degradation estimation unit 120, a storage degradation estimation unit 130, and a battery degradation estimation unit 140.

  The total deterioration level detection unit 110 detects the current total battery deterioration level in which both cycle deterioration and storage deterioration are combined. Details will be described later.

  The cycle deterioration estimation unit 120 estimates a future cycle deterioration degree caused by charging and discharging of the battery. As described above, the cycle deterioration is a deterioration that proceeds mechanically due to friction of electrodes and the like caused by expansion and contraction of the inside of the battery when the battery is charged and discharged. Therefore, the cycle deterioration estimation unit 120 estimates the future cycle deterioration by predicting the future charge / discharge number based on the number of times of charge / discharge of the battery in a certain period (unit period) (hereinafter also referred to as a cycle). Note that the number of times the battery is charged and discharged in a certain period can be considered as an integrated value of the output characteristic (for example, power or current) for a certain period. Therefore, in this embodiment, future cycle deterioration is estimated based on the integrated value of the output characteristics. The cycle deterioration estimation unit 120 includes an output characteristic integrated value storage unit 121, an output characteristic integrated value prediction unit 122, and a cycle deterioration degree estimation unit 123.

  The output characteristic integrated value storage unit 121 stores an integrated value per a certain period (unit period) nearest to the output characteristic (for example, power or current) detected by the output characteristic detection unit. As described above, the number of times the battery is charged and discharged in a certain period (unit period) can be considered as an integrated value of the output characteristics in the certain period. Therefore, the output characteristic integrated value storage unit 121 stores the number of times the battery is charged and discharged in a certain period. Here, the output characteristic detection unit is specifically a current sensor that detects a battery current or a voltage sensor that detects a voltage. By such a sensor, the input / output current value voltage value is detected, and the power is detected. Output characteristic integrated values include integrated value of charge power [kWh], integrated value of discharge power [kWh], integrated value of absolute value of charge power and discharge power [kWh], integrated value of charge current [Ah], discharge Any of the integrated value [Ah] of current and the integrated value [Ah] of absolute values of charging current and discharging current may be used. By selecting appropriately, the estimation accuracy can be increased without cost. The unit period to be stored can be arbitrarily set. However, a longer period is preferable to a shorter period. This is because noise may be included in a short period. For example, when the vehicle owner is changed, it is desirable to reset. This is because if the vehicle owner is changed, the state in which electric power is integrated changes.

  The output characteristic integrated value prediction unit 122 calculates (predicts) the integrated value (future value) of the output characteristic after the desired period by multiplying the integrated value per unit period of the output characteristic by the desired period. To do.

  The cycle deterioration degree estimation unit 123, based on the integrated value of the output characteristics after a desired period and a preset cycle deterioration characteristic, changes the cycle deterioration after a desired period (changes relative to the current deterioration degree). ). The cycle deterioration characteristic is a characteristic shown in FIG. 2 and is stored in advance in a storage medium provided in the controller. Here, a method for setting the cycle deterioration characteristic will be described with reference to FIG. A general cycle test for battery evaluation in which the battery is repeatedly charged and discharged is performed, and the relationship between the cycle and the degree of deterioration is plotted. Even during this cycle test, storage deterioration proceeds due to the chemical reaction between the battery electrode and the electrolyte. Therefore, as shown in FIG. 2, it is important to set cycle deterioration characteristics excluding the storage deterioration during the cycle test. When the cycle deterioration characteristics are plotted in this manner, it can be seen that the capacity retention rate decreases as the number of cycles increases. That is, it can be seen that the cycle deterioration proceeds in proportion to the cycle.

  The storage deterioration estimation unit 130 estimates a future storage deterioration degree mainly due to a chemical reaction that occurs with time inside the battery. As described above, the storage deterioration is, for example, deterioration that progresses with time due to a chemical reaction between the electrode of the battery and the electrolyte, and progresses with the passage of time from the time when the electrode touches the electrolyte. Therefore, the storage deterioration estimation unit 130 measures an elapsed period after the electrode touches the electrolyte, obtains the current storage deterioration degree based on the period, and obtains the storage deterioration degree after a desired period. The amount of change in storage deterioration after this period is estimated (the amount of change with respect to the current degree of deterioration). The storage degradation estimation unit 130 includes a storage degradation level calculation unit 131 and a storage degradation level estimation unit 132.

  The storage deterioration degree calculation unit 131 obtains the current storage deterioration degree based on the elapsed time from the time when the electrode touches the electrolyte and a preset storage deterioration characteristic. The storage deterioration characteristic is, for example, the characteristic shown in FIG. 3 and is stored in advance in a storage medium included in the controller. Such characteristics can be obtained by a general storage test for battery evaluation. From FIG. 3, it can be seen that storage degradation is a characteristic that proceeds in proportion to the square root of time. The timer is a timer mounted on the vehicle. Therefore, in the battery manufacturing process, the time from when the electrode touches the electrolyte to when the vehicle timer starts timing cannot be measured. Therefore, the time from when the electrode touches the electrolyte to when the time is started by the vehicle timer is managed as a certain time, and the certain time is added to the time measured by the timer. It should be noted that the time from when the electrode touches the electrolyte to when the vehicle timer starts timing is minimal compared to the battery life, and can be ignored.

  The storage deterioration level estimation unit 132 obtains a storage deterioration level after a desired period based on the storage deterioration characteristic, and estimates a storage deterioration change amount after the desired period.

  The battery deterioration estimation unit 140 estimates the future battery deterioration degree based on the current total deterioration degree, the cycle deterioration change amount after a desired period, and the storage deterioration change amount after the desired period. The estimation result is, for example, as shown in FIG.

  FIG. 5 is a block diagram showing the control contents of the total deterioration level detection unit 110.

  The total deterioration level detection unit 110 detects the total battery deterioration level at the present time by adding both cycle deterioration and storage deterioration. The total deterioration detection unit 110 includes a cycle deterioration calculation unit 111, a storage deterioration calculation unit 112, and a total deterioration calculation unit 113.

  The cycle deterioration calculation unit 111 calculates the current degree of cycle deterioration due to charging and discharging of the battery. The cycle deterioration calculation unit 111 includes a total output characteristic integrated value storage unit 1111 and a cycle deterioration degree calculation unit 1112.

  The total output characteristic integrated value storage unit 1111 stores the integrated value of the output characteristic detected by the output characteristic detection unit so far. The output characteristic detection unit is specifically a current sensor that detects a battery current or a voltage sensor that detects a voltage. By such a sensor, the input / output current value voltage value is detected, and the power is detected. Also, as the output characteristic integrated value, the integrated value of charge power [kWh], the integrated value of discharge power [kWh], the integrated value of absolute values of charge power and discharge power [kWh], the integrated value of charge current [Ah], Either the integrated value [Ah] of the discharge current or the integrated value [Ah] of the absolute value of the charging current and the discharging current may be used.

  The cycle deterioration degree calculation unit 1112 calculates the current cycle deterioration degree based on the total output characteristic integration and a preset cycle deterioration characteristic. The cycle deterioration characteristics are as described above.

  The storage deterioration calculation unit 112 calculates the current storage deterioration degree mainly due to a chemical reaction that occurs over time regardless of charge / discharge inside the battery. The storage deterioration calculation unit 112 includes a storage deterioration degree calculation unit 1121.

  The storage deterioration degree calculation unit 1121 obtains the current storage deterioration degree based on the elapsed time from the time when the electrode touches the electrolyte and a preset storage deterioration characteristic. The storage deterioration characteristics are as described above.

  The total deterioration calculation unit 113 calculates the current total deterioration degree based on the current cycle deterioration degree and the current storage deterioration degree.

  FIG. 6 is a flowchart of a life prediction routine executed by the controller of the battery deterioration estimation device. The controller repeatedly executes this routine.

  In step S210, the controller estimates the degree of deterioration after a predetermined period while gradually extending the period. Specifically, for example, the degree of deterioration after a period such as one month later, two months later, and three months later is estimated.

  In step S220, the controller determines whether or not the degree of deterioration after a predetermined period exceeds the use limit deterioration degree. If the determination result is negative, the controller once exits the process. If the determination result is affirmative, the controller executes the process of step S230.

  In step S230, the controller predicts the period when the degree of deterioration estimated in step S210 exceeds the use limit deterioration degree for the first time as the remaining life.

  Instead of obtaining the remaining life (period) of the battery, the travel distance until reaching the remaining life may be predicted. Specifically, it is as follows.

  FIG. 7 is a flowchart of a travel distance & usage time storage routine executed by the controller of the battery deterioration estimation device.

  In step S310, the controller stores the correlation between the current travel distance and the usage time.

  FIG. 8 is a diagram illustrating an example of the correlation between the travel distance and the use time stored in the controller.

  By step S310, for example, the data shown in FIG. 8 is stored in the controller. Roughly, the travel distance is proportional to the usage time.

  FIG. 9 is a flowchart of a travel distance & usage time storage routine executed by the controller of the battery deterioration degree estimation device.

  In step S410, the controller converts the remaining life into the predicted travel distance based on the correlation stored in step S310.

  As shown in FIG. 8, the correlation between the travel distance and the usage time is often different depending on the user. Therefore, it is preferable to reset the data and store the correlation again at the timing when the user changes.

  As described above, in this embodiment, the degree of deterioration of the battery is not simply estimated in association with the square root of the total travel distance. In this embodiment, the deterioration is mainly caused by the storage deterioration that progresses with time due to the chemical reaction between the battery electrode and the electrolyte, and the friction of the electrode and the like due to the expansion and contraction of the inside of the battery when the battery is charged and discharged. It was divided into cycle deterioration that mechanically progressed by the above, and each deterioration was estimated. In this way, it is possible to accurately estimate how much the battery will deteriorate in how many years from now, how much the remaining battery life is, or how much can be run.

  Further, in the present embodiment, the current total battery deterioration degree in which both cycle deterioration and storage deterioration are added is detected by the method described in FIG. Thereby, the present total degree of deterioration of the battery can be detected without requiring a special device.

(Second Embodiment)
FIG. 10 is a diagram for explaining the concept of the second embodiment.

  As described above, the degree of progress of storage deterioration corresponds to the square root of time, but there is also sensitivity to temperature. For example, as shown in FIG. 10, the higher the temperature, the easier the deterioration proceeds. The deterioration coefficient on the vertical axis is a coefficient multiplied by the capacity maintenance rate. The smaller the deterioration coefficient, the smaller the capacity maintenance rate, that is, the degree of deterioration increases. In the present embodiment, the storage deterioration is calculated by further considering the temperature history (frequency of occurrence of temperature) so far. A specific configuration will be described with reference to FIG.

  FIG. 11 is a block diagram showing the control contents of the second embodiment of the battery deterioration degree estimating apparatus according to the present invention.

  In the following description, parts having the same functions as those described above are denoted by the same reference numerals, and redundant description is omitted as appropriate.

  In the present embodiment, the storage deterioration estimation unit 130 further includes a storage temperature frequency storage unit 133 in addition to the configuration of the first embodiment. The storage temperature frequency storage unit 133 stores the temperature frequency so far in units of a fixed period based on the temperature information output from the temperature detection unit (battery temperature sensor) and the time information of the time measurement unit. Since the vehicle battery is an assembled battery, it is preferable that the temperature detection unit measures the hottest point where the deterioration proceeds quickly. A thermistor or the like may be used as the temperature detection unit.

  Then, the storage deterioration level calculation unit 131 and the storage deterioration level estimation unit 132 correct the storage deterioration level using the temperature information stored in the storage temperature frequency storage unit 133. Specifically, for example, using the stored frequency occurrence frequency information, the degree of deterioration is integrated by obtaining the time of exposure to the temperature, and the storage deterioration degree is corrected.

  In this way, temperature sensitivity, which is an important factor in battery storage deterioration, can be applied, so that the battery storage deterioration degree can be estimated with higher accuracy. As a result, the remaining battery life can be estimated more accurately. Note that, depending on the characteristics of the battery, the temperature sensitivity may be negligible, so the present embodiment may be applied as appropriate according to the characteristics of the battery. Further, the concept of the present embodiment may be applied to the storage deterioration level calculation unit 1121 of the storage deterioration calculation unit 112 of the total deterioration level detection unit 110.

(Third embodiment)
FIG. 12 is a diagram for explaining the concept of the third embodiment.

  The battery temperature changes depending on the outside air temperature. Therefore, as shown in FIG. 12, a temperature change due to seasonal variation that takes one cycle in one year is taken into consideration by considering a temperature change in the past year. This makes it possible to estimate the battery storage deterioration level with higher accuracy and to estimate the remaining life of the battery more accurately.

(Fourth embodiment)
FIG. 13 is a diagram for explaining the concept of the fourth embodiment.

  As described above, the degree of progress of storage deterioration corresponds to the square root of time, but there is also sensitivity to the battery charge rate SOC (State Of Charge). For example, as shown in FIG. 13, as the SOC increases, the deterioration easily proceeds. Therefore, in the present embodiment, the storage deterioration is calculated in consideration of the SOC history (SOC occurrence frequency) so far. A specific configuration will be described with reference to FIG.

  FIG. 14 is a block diagram showing the control contents of the fourth embodiment of the battery deterioration degree estimating apparatus according to the present invention.

  In the present embodiment, the storage deterioration estimation unit 130 further includes a storage SOC frequency storage unit 134 in addition to the configuration of the first embodiment. The stored SOC frequency storage unit 134 stores the SOC frequency so far in units of a fixed period based on the SOC information output by the SOC detection unit and the time information of the time measuring unit. The SOC detection method is a general method such as a method of measuring a voltage in a state where there is no polarization due to energization and calculating a current SOC from the relationship between the voltage and the SOC, a method of calculating SOC from an energization amount using an ammeter, May be detected by a typical method.

  Then, the storage deterioration level calculation unit 131 and the storage deterioration level estimation unit 132 correct the storage deterioration level by using the SOC information stored in the storage SOC frequency storage unit 134. Specifically, for example, by using the stored SOC occurrence frequency information to determine the time that the battery has been exposed to the SOC, the degree of deterioration may be integrated and the degree of storage deterioration may be corrected.

  In this way, the SOC sensitivity, which is an important factor for storage deterioration of the battery, can be applied, so that the battery storage deterioration degree can be estimated with higher accuracy. Thereby, the remaining life of the battery can be estimated more accurately. Depending on the characteristics of the battery, the SOC sensitivity may be negligible. Therefore, this embodiment may be applied as appropriate according to the characteristics of the battery. Further, the concept of the present embodiment may be applied to the storage deterioration level calculation unit 1121 of the storage deterioration calculation unit 112 of the total deterioration level detection unit 110.

(Fifth embodiment)
FIG. 15 is a diagram for explaining the concept of the fifth embodiment.

  The fifth embodiment is a combination of the second embodiment and the fourth embodiment. As shown in FIG. 15, the temperature and the occurrence frequency of the SOC are mapped and stored. Then, the storage deterioration level calculation unit 131 and the storage deterioration level estimation unit 132 use the stored temperature and SOC occurrence frequency information to obtain the degree of deterioration by obtaining the temperature and time the battery has been exposed to the SOC. And correct the degree of storage deterioration.

  In this way, since the temperature and SOC sensitivity, which are important factors for battery storage deterioration, can be applied, the battery storage deterioration level can be estimated with higher accuracy. Thereby, the remaining life of the battery can be estimated more accurately. Depending on the characteristics of the battery, the temperature sensitivity and SOC sensitivity may be negligible. Therefore, this embodiment may be applied as appropriate according to the characteristics of the battery. Further, the concept of the present embodiment may be applied to the storage deterioration level calculation unit 1121 of the storage deterioration calculation unit 112 of the total deterioration level detection unit 110.

(Sixth embodiment)
FIG. 16 is a diagram for explaining the concept of the sixth embodiment.

  As described above, the degree of progress of cycle deterioration corresponds to the number of times of charging and discharging (cycle), but there is also sensitivity to temperature. For example, as shown in FIG. 16, the higher the temperature, the easier the deterioration proceeds. Since the number of times of charging / discharging the battery can be considered as an integrated value of the output characteristics, the cycle deterioration is estimated in relation to the integrated value of the output characteristics. Therefore, in the present embodiment, the cycle deterioration is calculated by further considering the temperature history (frequency of occurrence of temperature) so far. A specific configuration will be described with reference to FIG.

  FIG. 17 is a block diagram showing the control contents of the sixth embodiment of the battery deterioration degree estimating apparatus according to the present invention.

  In the present embodiment, the cycle deterioration estimation unit 120 further includes a cycle time frequency storage unit 124 in addition to the configuration of the first embodiment. The cycle temperature frequency storage unit 124 stores the frequency of the temperature so far in units of a fixed period based on the temperature information output from the temperature detection unit (battery temperature sensor) and the time information of the time measurement unit. The cycle deterioration degree estimation unit 123 corrects the cycle deterioration degree using the temperature information stored in the cycle temperature frequency storage unit 124. That is, if the frequency of high temperatures is high, correction is made so that the progress of cycle deterioration proceeds.

  In this way, temperature sensitivity, which is an important factor for battery cycle deterioration, can be applied, so that the degree of battery cycle deterioration can be estimated with higher accuracy. As a result, the remaining battery life can be estimated more accurately. Depending on the characteristics of the battery, the temperature sensitivity may be negligible. Therefore, this embodiment may be applied as appropriate according to the characteristics of the battery. The concept of the present embodiment may be applied to the cycle deterioration degree calculation unit 1112 of the cycle deterioration calculation unit 111 of the total deterioration degree detection unit 110.

  The embodiment of the present invention has been described above. However, the above embodiment only shows a part of application examples of the present invention, and the technical scope of the present invention is limited to the specific configuration of the above embodiment. Absent.

  The above embodiments can be appropriately combined.

  This application claims the priority based on Japanese Patent Application No. 2014-136070 for which it applied to Japan Patent Office on July 1, 2014, All the content of this application is integrated in this specification by reference.

Claims (13)

A total deterioration detection unit that detects the current total deterioration of the battery;
A cycle deterioration estimation unit that estimates the degree of future cycle deterioration due to charge and discharge of the battery;
A storage deterioration estimation unit for estimating a future storage deterioration degree occurring over time inside the battery;
A battery deterioration estimation unit that estimates a future battery deterioration degree based on the current total deterioration degree, the future cycle deterioration degree, and the future storage deterioration degree;
A battery deterioration degree estimation device having In the battery deterioration degree estimation device according to claim 1,
The cycle deterioration estimation unit obtains an integrated value of the output characteristics in a unit period, predicts a future integrated value based on the obtained integrated value, and calculates a future based on the predicted integrated value and a previously stored cycle deterioration characteristic. Estimate the degree of cycle deterioration of
Battery deterioration degree estimation device. In the battery degradation degree estimation apparatus according to claim 2,
The integrated value of the output characteristic includes an integrated value of charging power, an integrated value of discharging power, an integrated value of absolute values of charging power and discharging power, an integrated value of charging current, an integrated value of discharging current, an integrated value of charging current and discharging current. One of the absolute values,
Battery deterioration degree estimation device. In the battery deterioration degree estimation device according to claim 2 or claim 3,
The cycle deterioration characteristic is a characteristic that the cycle deterioration degree increases in proportion to the number of times of charge and discharge of the battery.
Battery deterioration degree estimation device. In the battery deterioration degree estimation device according to any one of claims 1 to 4,
The storage deterioration estimation unit calculates a current storage deterioration degree based on a time from a reference timing to the present time and a storage deterioration characteristic stored in advance, and based on the calculated current storage deterioration degree and the storage deterioration characteristic To estimate the degree of future storage deterioration,
Battery deterioration degree estimation device. In the battery deterioration degree estimation device according to claim 5,
The storage deterioration characteristic is a characteristic that the storage deterioration degree increases in proportion to the square root of time from the reference timing.
Battery deterioration degree estimation device. The battery deterioration degree estimation device according to any one of claims 1 to 6,
The total deterioration degree detection unit obtains a total output characteristic integrated value from a reference timing to the present, calculates a current cycle deterioration degree based on the obtained total output characteristic integrated value and a previously stored cycle deterioration characteristic, The current storage deterioration level is calculated based on the time from the reference timing to the present time and the storage deterioration characteristics stored in advance, and the current total deterioration level of the battery is calculated based on the current cycle deterioration level and the current storage deterioration level. To detect,
Battery deterioration degree estimation device. In the battery deterioration estimation device according to any one of claims 1 to 7,
A life prediction unit that calculates a time until a future battery deterioration degree estimated by the battery deterioration estimation part reaches a predetermined use limit deterioration degree;
Battery deterioration degree estimation device. In the battery deterioration degree estimation device according to any one of claims 1 to 8,
A storage unit for storing a correlation between a travel distance of the vehicle and a use time until the travel distance;
A conversion unit that converts time into travel distance based on the correlation;
A battery deterioration degree estimation device having The battery deterioration estimation device according to any one of claims 1 to 9,
A temperature storage unit for storing the frequency of the battery temperature within a predetermined time;
At least one of the storage deterioration characteristic and the cycle deterioration characteristic is corrected by the frequency of the battery temperature.
Battery deterioration degree estimation device. The battery deterioration estimation device according to claim 10,
The temperature storage unit stores the frequency of the temperature of the battery in the past year together with the generation time in a time series,
At least one of the storage deterioration characteristic and the cycle deterioration characteristic is corrected in consideration of the frequency of the battery temperature stored together with the generation time.
Battery deterioration degree estimation device. In the battery deterioration estimation device according to any one of claims 1 to 11,
An SOC storage unit for storing the frequency of the battery SOC within a predetermined time;
The storage deterioration characteristic is corrected by the frequency of the battery SOC.
Battery deterioration degree estimation device. Detect the current total deterioration of the battery,
Estimating the degree of future cycle deterioration due to charging and discharging of the battery,
Estimating the degree of future storage degradation occurring over time inside the battery,
Estimating a future battery degradation level based on the current total degradation level, the future cycle degradation level, and the future storage degradation level;
Battery deterioration estimation method.

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